{"product_id":"sierra-18-4348-exhaust-manifold-gasket-set-for-gm-454-7-4l-525-8-2l-replaces-mercury-27-46820-27-41813-1","title":"Sierra 18-4348 Exhaust Manifold Gasket Set, Replaces 27-46820, for GM 454, 525 (7.4L \u0026 8.2L)","description":"\u003cp\u003eThe Sierra 18-4348 Exhaust Manifold Gasket Set is a complete gasket kit for GM 454, 525 (7.4L \u0026amp; 8.2L) marine engines, supplying every gasket needed to reseal the exhaust manifold assembly in one purchase. The set contains two 18-0418 Manifold to Cylinder Head Gaskets and two 18-0897 Exhaust Elbow Mounting Gaskets, covering both the manifold-to-head joint and the exhaust elbow mounting joint on the engine. Each gasket is finished in white and is built to Sierra's standard for marine exhaust sealing applications, where consistent, leak-free contact between mating surfaces is critical to prevent exhaust and water intrusion. Because the kit bundles both gasket types required for a manifold gasket job, installers do not need to source the manifold-to-head gasket and the elbow gasket separately. The 18-4348 set is intended as a like-for-like replacement for the OEM gaskets on GM 454, 525 (7.4L \u0026amp; 8.2L) engines and is backed by Sierra's standard customer satisfaction warranty. This kit is a straightforward fit for anyone servicing the exhaust manifold and exhaust elbow on a compatible GM 454\/525 marine engine.\u003c\/p\u003e\u003ch3\u003eSpecifications\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBrand:\u003c\/strong\u003e Sierra\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer Part Number:\u003c\/strong\u003e 18-4348\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProduct Name:\u003c\/strong\u003e Exhaust Manifold Gasket Set\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eFitment:\u003c\/strong\u003e GM 454, 525 (7.4L \u0026amp; 8.2L)\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eContains:\u003c\/strong\u003e (2) 18-0418 Manifold to Cylinder Head Gasket; (2) 18-0897 Exhaust Elbow Mounting Gasket\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eColor:\u003c\/strong\u003e White\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 0.25 pounds\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eUPC:\u003c\/strong\u003e 030999755964\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFitment\u003c\/h3\u003e\u003cul\u003e\u003cli\u003eGM 454, 525 (7.4L \u0026amp; 8.2L)\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eReplaces (OEM)\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e27-46820 (Manifold to Cylinder Head Gasket)\u003c\/li\u003e\n\u003cli\u003e27-41813-1 (Exhaust Elbow Mounting Gasket)\u003c\/li\u003e\n\u003cli\u003eGLM 39890\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\u003cp\u003e\u003cstrong\u003eWhat engines does the Sierra 18-4348 gasket set fit?\u003c\/strong\u003e The Sierra 18-4348 Exhaust Manifold Gasket Set fits GM 454, 525 (7.4L \u0026amp; 8.2L) marine engines.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat is included in the 18-4348 gasket set?\u003c\/strong\u003e The kit contains two 18-0418 Manifold to Cylinder Head Gaskets and two 18-0897 Exhaust Elbow Mounting Gaskets, four gaskets total.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat OEM part numbers does the 18-4348 set replace?\u003c\/strong\u003e The gaskets in the Sierra 18-4348 set correspond to OEM numbers 27-46820 (manifold to cylinder head gasket) and 27-41813-1 (exhaust elbow mounting gasket), and the set is also interchangeable with GLM 39890.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow much does the 18-4348 gasket set weigh?\u003c\/strong\u003e The Sierra 18-4348 Exhaust Manifold Gasket Set weighs 0.25 pounds.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWhat color are the gaskets in this set?\u003c\/strong\u003e The gaskets in the Sierra 18-4348 set are white.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eIs the 18-4348 set a genuine Sierra part?\u003c\/strong\u003e Yes, part number 18-4348 is a Sierra-branded Exhaust Manifold Gasket Set, and Sierra parts are covered under Sierra's customer satisfaction warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDo I need to buy the manifold gasket and elbow gasket separately?\u003c\/strong\u003e No, the Sierra 18-4348 set already includes both gasket types needed for the job: two manifold-to-cylinder-head gaskets and two exhaust elbow mounting gaskets.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eWill the 18-4348 gasket set work on a 502 or 8.2L GM engine?\u003c\/strong\u003e The Sierra 18-4348 Exhaust Manifold Gasket Set is designated for GM 454, 525 (7.4L \u0026amp; 8.2L) engines, so it covers the 8.2L displacement listed in that fitment.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eDoes the 18-4348 set include a warranty?\u003c\/strong\u003e Yes, the Sierra 18-4348 Exhaust Manifold Gasket Set is covered under Sierra's industry customer satisfaction warranty.\u003c\/p\u003e\u003cp\u003e\u003cstrong\u003eHow many gaskets come in the Sierra 18-4348 kit?\u003c\/strong\u003e The Sierra 18-4348 kit contains four gaskets total: two 18-0418 Manifold to Cylinder Head Gaskets and two 18-0897 Exhaust Elbow Mounting Gaskets.\u003c\/p\u003e","brand":"Sierra","offers":[{"title":"Default Title","offer_id":48988193652955,"sku":"SIE-18-4348","price":41.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0839\/7586\/4539\/files\/SIE-18-4348_lg__75008.1558128199.500.750.jpg?v=1785188422","url":"https:\/\/www.goodvibesmarina.com\/products\/sierra-18-4348-exhaust-manifold-gasket-set-for-gm-454-7-4l-525-8-2l-replaces-mercury-27-46820-27-41813-1","provider":"Good Vibes Marina","version":"1.0","type":"link"}